Absolutely Free 4K Drag and Drop Style Effects for Editors
You will need to register but Rampant Design is a good site and this is a great deal.
From the Vimeo post:
100% Free Optical Flares, Light Leaks, Film Flashes, Smoke, Fire, Dust, Embers, Film Effects, Grunge, Distortion, Film Clutter, Glitch Effects, Transitions and more.
Mike